20011013321100 has 72 divisors (see below), whose sum is σ = 57937417340880. Its totient is φ = 5332686305280.

The previous prime is 20011013321083. The next prime is 20011013321141. The reversal of 20011013321100 is 112331011002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20011013321100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21952017 + ... + 22845416.

Almost surely, 2^{20011013321100} is an apocalyptic number.

20011013321100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011013321100 is an abundant number, since it is smaller than the sum of its proper divisors (37926404019780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011013321100 is a wasteful number, since it uses less digits than its factorization.

20011013321100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44798939 (or 44798932 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20011013321100 its reverse (112331011002), we get a palindrome (20123344332102).

The spelling of 20011013321100 in words is "twenty trillion, eleven billion, thirteen million, three hundred twenty-one thousand, one hundred".